title: Confirmatory factor analysis of the Eating Disorder Examination-Questionnaire (EDE-Q).
abstract: OBJECTIVE
  To compare the goodness-of-fit of five models of Eating Disorder Examination-Questionnaire (EDE-Q) data, in clinical and community samples.
  
  
  METHODS
  The EDE-Q was administered to 228 eating disorder patients and 211 non-eating disordered university students. Confirmatory factor analysis was used to compare the validity of the original four EDE-Q subscales with that of brief one-factor, extended one-factor, two-factor, and three-factor models. Measurement invariance across the two samples was considered.
  
  
  RESULTS
  The only model to provide an acceptable fit to the data was the brief one-factor model consisting of eight Weight and Shape Concern items. Scores on this scale correlated highly with the original EDE-Q subscales.
  
  
  CONCLUSIONS
  The reliability of the EDE-Q may be increased if a modified scoring system is used. This complements findings from recent research with the Eating Disorder Examination (EDE).
authors.affiliation: Centre for Clinical Interventions, Northbridge, Western Australia, Australia. karina.allen@uwa.edu.aua
authors.forename: Karina L
authors.initials: KL
authors.lastname: Allen
authors.forename: Susan M
authors.initials: SM
authors.lastname: Byrne
authors.forename: Amy
authors.initials: A
authors.lastname: Lampard
authors.forename: Hunna
authors.initials: H
authors.lastname: Watson
authors.forename: Anthea
authors.initials: A
authors.lastname: Fursland
mesh_terms: D016022:Case-Control Studies; D004435:Eating / Q000523:psychology; D005163:Factor Analysis, Statistical; D001068:Feeding and Eating Disorders / Q000175:diagnosis* / Q000523:psychology; D006801:Humans; D007406:Interview, Psychological; D015233:Models, Statistical; D011594:Psychometrics / Q000379:methods*; D012016:Reference Values; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires